Grave-Risk Defences Require Timely Factual Evidence Before Section 47 Expert Reports Are Ordered

1. Introduction

This judgment concerns the evidential foundations and procedural discipline required when a parent opposes a child’s return under the Hague Convention on the Civil Aspects of International Child Abduction 1980. Its immediate subject was not whether separation from a primary carer could ever establish grave risk, but whether the respondent mother should be permitted, very late in the proceedings, to introduce that factual case and obtain a court-directed psychological assessment.

The applicant father sought the return of their six-year-old child to Australia. The respondent ultimately wished to argue that she would voluntarily refuse to accompany the child and that the resulting separation would expose the child to grave psychological harm. However, neither of her two existing affidavits advanced that factual basis. She therefore sought permission to file another affidavit and an order procuring a psychologist’s report under section 47 of the Family Law Act, 1995.

The High Court refused both applications. The central lesson is that an expert report cannot substitute for the factual evidence needed to identify a welfare issue, and that a grave-risk defence must be advanced consistently with the Convention’s expedited procedure. Nevertheless, the court expressly preserved the possibility that, exceptionally and on cogent evidence, a risk arising from a parent’s own refusal to return could satisfy Article 13(b).

2. Background and Procedural Context

The Australian proceedings

Child-arrangements proceedings were already underway before the Federal Circuit and Family Court of Australia before the respondent brought the child to Ireland in October 2025. The respondent accepted that the journey was initially temporary and that return tickets had been purchased.

Earlier Australian orders had provided for the child to live with the respondent and spend time with the applicant. An order made on 5 November 2025 directed the child’s return and provided for a reversal of custody, pending further order, if the child was not returned as required. Although that order was initially made without the respondent’s participation, subsequent hearings had occurred with both sides involved. On the material available to Jackson J., the operative arrangement remained that the child should live with the applicant.

The Australian court had also received a child-welfare report. Jackson J. had not seen that report because of the private nature of those proceedings. Its existence nevertheless demonstrated that the courts of habitual residence were actively addressing the child’s circumstances.

Delay and the change of defence

The Irish return proceedings began on 1 April 2026. Their subsequent history was central to the exercise of discretion:

• Repeated attempts at service were unsuccessful, requiring two substituted-service orders.
• The respondent missed deadlines for replying evidence and did not consistently comply with attendance directions.
• Her first affidavit was sworn on 10 July 2026, more than three months after proceedings commenced.
• A July hearing date was lost because of delays affecting both the affidavit evidence and the child-assessment process.
• A second respondent affidavit was sworn on 18 August 2026.
• At the hearing on 1 September 2026, the respondent introduced the proposed separation-based defence for the first time.

The existing affidavits had alleged grave risk through the applicant’s behaviour and had referred to difficulties affecting the respondent’s return. They did not state that she would refuse to return voluntarily or identify grave risk arising simply from mother–child separation.

At the September hearing, the respondent accepted that her existing evidence did not establish the necessary threshold for the behaviour-based grave-risk case. She elected to pursue only the newly proposed separation case. That concession concerned the sufficiency of the evidence; it was not a judicial finding that every earlier allegation was false.

By the October hearing, the proposed further affidavit had still not been drafted and sworn. Nor were there confirmed dates for the proposed psychologist to begin or complete an assessment. These omissions reinforced the court’s conclusion that the applications would produce further substantial delay.

3. Summary of the Decision

The High Court reached five principal conclusions:

1. There is one grave-risk defence. Different factual situations may engage Article 13(b), but the relevant risk must always be to the child, directly or indirectly.
2. A voluntary refusal to return is not an absolute legal bar to that defence. Such a case may exceptionally succeed, but it requires cogent evidence.
3. A section 47 assessment requires an existing factual foundation. The court should not commission an intrusive expert investigation merely to discover whether a welfare issue can be established.
4. Additional affidavits require permission. The Convention’s summary procedure does not entitle a respondent to introduce new factual cases indefinitely.
5. The circumstances did not justify either application. The delay, absence of sworn supporting evidence, lack of practical assessment arrangements and availability of Australian proceedings weighed against granting relief.

The respondent had confirmed that she did not rely on the existing affidavits to support the revised defence and that refusal of these applications would be determinative. The court accordingly indicated that it would make the specified substantive orders, including a declaration of wrongful retention, and hear the parties on implementation and transitional arrangements. The judgment does not reproduce the complete wording of all the numbered reliefs granted.

4. The Governing Legal Framework

Article 13(b): grave risk to the child

Article 13(b) permits the requested court to decline return where the person opposing return establishes a grave risk that return would expose the child to physical or psychological harm or otherwise place the child in an intolerable situation.

The burden rests on the respondent. The court described the evidential demands as extremely high. Ordinary distress associated with relocation or separation does not, without more, establish grave risk.

The judgment also distinguishes Convention proceedings from a substantive custody dispute. The Irish court was not deciding which parent offered the preferable long-term home. Child welfare remained relevant, but within the particular purpose and limits of the return jurisdiction.

Order 133: a compact evidential procedure

Order 133 of the Rules of the Superior Courts requires the respondent’s replying affidavit to set out all grounds of defence. It permits an applicant’s response and requires directions for an expeditious hearing. Proceedings ordinarily take place on affidavit evidence, with oral evidence permitted exceptionally.

Jackson J. held that identifying the legal label “grave risk” was insufficient: the affidavit must also disclose the facts relied upon. Otherwise, the applicant cannot meaningfully answer the case and the summary procedure loses its effectiveness.

Further affidavits may be allowed under Order 40, rule 4, or the court’s inherent jurisdiction. However, permission is discretionary and turns on the interests of justice, assessed in the circumstances of the particular proceedings.

Section 47: assistance, not investigation without foundation

Section 47 of the Family Law Act, 1995 authorises reports on questions affecting the welfare of persons concerned in specified proceedings, including proceedings under the Child Abduction and Enforcement of Custody Orders Act, 1991. A report may be directed on application or on the court’s own motion and may be received in evidence.

The existence of that power was undisputed. The issue was whether it should be exercised. The court held that the factual basis for the asserted welfare concern must first be placed in evidence. The expert assists with evaluating established or properly evidenced circumstances; the statutory process is not a “fishing expedition” for a defence.

5. Precedents Cited and Their Influence

RK v. JK (Child Abduction: Acquiescence) [2000] 2 IR 416

Jackson J. relied on Barron J.’s explanation that the factual basis of a grave-risk defence ordinarily arises from circumstances preceding the wrongful removal or retention. Later events may be relevant where they aggravate an existing intolerable situation or create one.

The authority supported scrutiny of the respondent’s late change of position. The circumstances said to make separation dangerous were not shown to be newly discovered. They concerned the child’s Australian life or the anticipated consequences of living without the respondent and could have been addressed earlier. The judgment did not treat the authority as excluding all post-removal developments.

Stephen v. Paul Flynn Limited [2008] 4 IR 31

This decision supplied the general balance-of-justice approach to procedural delay. Clarke J.’s observations emphasised that greater importance may be attached to expedition and that excuses previously tolerated may no longer justify delay.

The quoted passage itself referred to Gilroy, without a fuller title or citation being supplied in this judgment. Its relevance was the development of a more demanding approach to timely litigation, not a separate Convention-specific rule.

Jackson J. applied that approach through a contextual assessment, considering the explanation and duration of delay, when information became available, prejudice, relevance, efficient case management and the child’s welfare.

McD v L [2009] IESC 81

This Supreme Court authority established the proper status of a section 47 report. It is expert opinion forming part of the evidence, not a determination entitled automatically to special or decisive weight. The court remains responsible for evaluating the evidence and deciding the case.

Jackson J. used that principle to reject any approach under which the proposed psychologist would effectively take over the court’s task. An assessment could assist judicial evaluation, but could not replace the respondent’s obligation to identify and prove the underlying factual case.

The passages quoted from this authority concern welfare adjudication in substantive family proceedings. Their application here related to the status of expert evidence; they did not convert the Hague proceedings into a general best-interests inquiry.

M (Child Access Arrangements) v F [2026] IEHC 537

Simons J.’s decision reaffirmed that an expert’s role is auxiliary rather than adjudicative. Although it concerned section 32 of the Guardianship of Infants Act, 1964, Jackson J. considered the same principles applicable to section 47 reports.

The quoted discussion identifies the Supreme Court authority as J.Mc.D. v. P.L. [2009] IESC 81, [2010] 2 IR 199. This is the same authority discussed above under the title used elsewhere in the judgment.

The extract also refers to D.K. v. P.I.K. (Child Relocation) for the proposition that judicial decision-making cannot be “subcontracted or delegated”. No further citation or factual account of that case is supplied. Its contribution here was confined to reinforcing the court’s exclusive responsibility for adjudication.

Re C (A Minor) (Abduction) [1989] 1 FLR 403

Butler-Sloss LJ’s reasoning addressed the danger of allowing an abducting parent to manufacture a psychological obstacle to return by refusing to accompany a young child. If refusal alone sufficed, the Convention’s return mechanism could readily be defeated.

The quoted passage draws on Re E (A Minor) (Abduction) [1989] 1 FLR 135, 142, which emphasised that wrongful removal or retention should not confer an adventitious advantage.

These authorities supplied the strong policy objection to a parent relying on conditions generated through their own conduct. Jackson J. also noted that Re C (A Minor) (Abduction) proceeded through consideration of undertakings from the father: the decision therefore involved practical return arrangements as well as criticism of the mother’s position.

Re S & B [2005] EWHC 733 (Fam)

Potter P.’s judgment qualified an overly absolute application of the self-created-risk principle. Article 13(b) addresses harm to the child, not whether the abducting parent deserves assistance. Wrongful conduct is already part of the setting in which the Convention makes its exceptions available.

Jackson J. expressly endorsed this reasoning. A parent’s responsibility for creating the threatened situation cannot automatically exclude the defence. However, the defence still requires cogent evidence and cannot be established merely by asserting a refusal to return.

Re AT and SS [2015] EWHC 2703

MacDonald J.’s decision helped reconcile these positions. Although the source of the risk may not itself determine whether Article 13(b) applies, a parent’s conscious refusal to return remains relevant to assessing whether the alleged situation falls within the exception.

Jackson J. agreed. The respondent’s conduct was neither an automatic disqualification nor legally irrelevant. It formed part of the overall assessment.

C.M.W. v. S.J.F. [2019] IECA 227

This Irish Court of Appeal decision provided a closely relevant domestic comparison. It acknowledged that a parent’s refusal to accompany children could cause distress and disruption, while warning that such a decision could become a powerful means of defeating summary return.

The court there considered the children’s familiarity with their father, the absence of evidence establishing psychological harm, and the availability of active proceedings in British Columbia. Jackson J. drew corresponding support from the child’s positive presentation concerning Australia and the applicant, and from the Australian court’s continuing involvement.

The applicant also submitted that the Court of Appeal had not admitted new evidence or remitted the earlier case for that purpose. That was an argument presented by the applicant, rather than a freestanding rule prohibiting further evidence in every refusal-to-return case.

The Hague Guide to Good Practice

The court additionally relied on paragraph 72 of the Guide to Good Practice of the 1980 Hague Convention Part VI Article 13(1)(b) 2020. It states that, as a rule, a parent should not create a potentially harmful situation through wrongful removal or retention and then rely on it to establish grave risk.

This guidance supported the Convention’s anti-manipulation policy. It was read alongside, rather than as displacing, the authorities recognising that genuine child-specific risk may exceptionally require consideration regardless of its source.

6. Analysis of the Court’s Reasoning

The essential distinction: an available argument is not an evidenced defence

The court carefully separated legal availability from factual proof. It did not hold that the respondent’s proposed argument was inherently inadmissible. Instead, it found that the factual premise—her definite intention not to return—had not been established by sworn evidence, and that the alleged consequences for the child were likewise unsupported.

Counsel’s submissions could identify the argument but could not supply the missing evidence. The respondent’s express decision not to rely on the existing affidavits left no evidential foundation for either the revised defence or the requested assessment.

The court was not obliged to construct the defence

Jackson J. rejected the suggestion that the court should undertake its own investigation into hypothetical consequences of separation. The proceedings were adversarial: the applicant bore the relevant Article 3 burden, while the respondent had to raise and prove an exception.

This does not negate section 47’s express power to commission a report on the court’s own motion. It means that the existence of that power does not impose a duty to search for facts that a party has not adduced.

Why further affidavit evidence was refused

The refusal resulted from cumulative circumstances, not simply lateness. More than six months had elapsed; previous opportunities to present evidence had been available; the proposed case was introduced only at the substantive hearing; and there was no satisfactory explanation for withholding the relevant circumstances earlier.

Practical preparation was also deficient. There was no completed affidavit for the court to examine and no confirmed timetable for expert evidence. An assessment involving Australian arrangements would potentially require significant overseas inquiry. The court found that granting permission would trigger successive stages of further delay.

These matters led Jackson J. expressly to characterise the applications as another effort to delay proceedings. That was a finding about this litigation history, not a presumption applicable to every late application involving child welfare.

The significance and limits of the child’s report

The existing Voice of the Child/Child Objections report described the child as separating from the respondent without difficulty and recalling Australia and the applicant positively. Although the child said she would “never” return, she supplied no reason consistent with those positive accounts.

The report did not support the proposed grave-risk case. Nevertheless, it was not a comprehensive psychological assessment of prolonged separation from the primary carer. Its significance was contextual: the available child-specific evidence did not substantiate the asserted danger. The court did not establish a general rule that an easy separation during an interview excludes serious separation-related harm.

Australian proceedings and judicial comity

The Australian court’s active involvement mattered because detailed welfare and care arrangements could be addressed there. Jackson J. questioned why the respondent had not raised, or could not raise, the proposed difficulties in those proceedings.

This reflected the Convention’s allocation of responsibility between jurisdictions. It did not remove the Irish court’s duty to consider an adequately evidenced Article 13(b) defence. Rather, it strengthened the conclusion that the proposed Irish evidence-gathering exercise was neither justified nor proportionate in these circumstances.

“Exceptionality and cogent evidence”

Jackson J. described the proper approach to the proposed defence as a combination of exceptionality and cogent evidence. That formulation should be understood in its context: a parent’s voluntary refusal cannot routinely transform the ordinary consequences of separation into grave risk.

It should not be treated as replacing Article 13(b)’s wording with a separate statutory test. The ultimate question remains whether the respondent proves the Convention’s child-focused threshold.

7. Likely Impact

• Earlier identification of factual defences: Respondents should explain the actual circumstances supporting grave risk in their initial replying evidence, rather than rely on the defence’s legal label.
• More focused applications for expert reports: Applicants for section 47 assessments should identify the supporting sworn facts, the expert question and a workable timetable.
• Closer scrutiny of late changes: Courts may distinguish genuinely new information from a strategic change based on circumstances long known to the party.
• Continued scope for exceptional separation cases: The judgment leaves such cases open, but demands child-specific proof rather than assumptions arising from primary-carer status.
• Protection against over-delegation: Experts remain evidential assistants, not substitutes for judicial fact-finding or for a party’s proof obligations.
• Greater attention to cross-border implementation: The judgment contemplated possible document-sharing with the Australian court and communication between liaison judges to ease transition.

The decision’s strongest precedential contribution is procedural and evidential. It does not establish that every requested assessment must be refused where a parent voluntarily remains behind, nor that all late evidence is inadmissible. Its reasoning depends on the combination of an absent factual foundation, unexplained delay and the particular litigation history.

8. Complex Concepts Simplified

Grave risk

A serious danger of harm or an intolerable situation, not simply the upset ordinarily associated with return or family separation.

Habitual residence

The country in which the child’s life was ordinarily based before the disputed removal or retention. It is distinct from nationality.

Wrongful retention

Keeping a child abroad in breach of relevant custody rights, even where the original journey was permitted or temporary.

Summary proceedings

An expedited, focused process. It remains fair, but is not a full trial of long-term parenting arrangements.

Evidential foundation

Facts properly placed before the court that support the issue being raised. A lawyer’s hypothetical argument is not itself evidence.

Judicial comity

Respect and cooperation between courts in different countries, including recognition of their respective responsibilities.

In-camera proceedings

Proceedings heard privately. Any relaxation of privacy to facilitate inter-court cooperation requires appropriate consideration.

9. Conclusion

WX v OON confirms that child protection and procedural expedition are not opposing absolutes. A court must remain open to a genuinely established risk, including one arising from a parent’s voluntary refusal to return, while preventing unsupported evidence-gathering applications from undermining the Convention’s operation.

The decisive requirements are timely factual evidence, a properly justified need for expert assistance and disciplined judicial assessment. On this record, those requirements were not met.